15780583216128 has 88 divisors (see below), whose sum is σ = 43417814567680. Its totient is φ = 5090510684160.

The previous prime is 15780583216127. The next prime is 15780583216129. The reversal of 15780583216128 is 82161238508751.

It is an interprime number because it is at equal distance from previous prime (15780583216127) and next prime (15780583216129).

It is a super-2 number, since 2×15780583216128² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15780583216127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82758133 + ... + 82948596.

Almost surely, 2^{15780583216128} is an apocalyptic number.

It is an amenable number.

15780583216128 is an abundant number, since it is smaller than the sum of its proper divisors (27637231351552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15780583216128 is a wasteful number, since it uses less digits than its factorization.

15780583216128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165706783 (or 165706765 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 57.

The spelling of 15780583216128 in words is "fifteen trillion, seven hundred eighty billion, five hundred eighty-three million, two hundred sixteen thousand, one hundred twenty-eight".